-3(3+3r)=-45

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Solution for -3(3+3r)=-45 equation: 


Simplifying
-3(3 + 3r) = -45
(3 * -3 + 3r * -3) = -45
(-9 + -9r) = -45

Solving
-9 + -9r = -45

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '9' to each side of the equation.
-9 + 9 + -9r = -45 + 9

Combine like terms: -9 + 9 = 0
0 + -9r = -45 + 9
-9r = -45 + 9

Combine like terms: -45 + 9 = -36
-9r = -36

Divide each side by '-9'.
r = 4

Simplifying
r = 4

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